Mold-board



(No Model.) S

0. A. ESSIG.

MOLD BOARD. No. 298,189. Patented May 6, 1884.

WITNESSES mam 63% A524;

UNITED STATES PATENT @FFICE.

OZIA A. ESSIG, OF CANTON, 01110. a

MOLD- BOARD.

SPECIFICATION forming part'of Letters Patent No. 298,189, dated May 6,1884.

Application filed January 9, 1884. (No model.)

To all whom it may concern:

Be it known that I, OZIA A. Essre, a,citizen of the United States,residing at Canton, in the county of Stark and State of Ohio,haveinvented certain new and useful Improvements in Mold-Boards, of whichthe following is a specification, reference being had therein to theaccompanyingdrawings.

Figure 1 is a side elevation of aplow having a mold-board constructedafter my improved plan. Fig. 2 is a face view of the mold-board with thedetachable portion thereof removed. Fig. 3 is a section on the line orm. 'Fig. 4. is a rear or inside face view of a modified form of themold-board. Fig. 5 is a section on an enlarged scale on line 3/ y, Fig.1, looking toward the rear of the plow. Fig. 6 shows a modified form ofcenter plate.

Inasmuch as that which forms the essential feature of the presentinvention may be applied to plows of any character, so far as theirgeneral construction is concerned, a description in detail of the partsother than the moldboard is not herein necessary. However, for a clearunderstanding of the drawings, it will be said that A represents thebeam, B one of the handles, D the standard, a C the share and point, Ethe landside, and F F the moldboard.

It has been customary heretofore to make the mold-boards for plows ofone piecethat is to say, integral from the forward to the rear end andfrom top to bottom. However, ithas been well known that thesemold-boards are much moreliable to wear in certain parts than at otherpoints, this wear being so great at or about the central part of themold-board that it will be practically worn out and worthless in thisregion while the rest of the board is yet of value. After this portionof the moldboard has become worn to such extent asto be worthless, thewhole has to be removed and a new one put in place thereof, and thusthere is considerable expense incident to the use of plows of thischaracter. To avoid this necessity of removing the whole mold-board whena portion thereof has become worn, I construct it as follows: Thecentral part of the moldboard is cast or otherwise provided with acomparatively large aperture, as shown at f, Figs. 2 and 3, and in thisaperture a detachable plate, F, is adapted to fit. This plate is Isituated at that part or region of the moldboard which receives the mostserious wear from the soil which is being turned over, the locationthereof being preferably substantially that which is shown in thedrawings. When the plate F has become impaired by wear, it can bereadily removed and another substifluted. I have shown two methods bywhich it can be held firmly in place,-one*method being shown in Figs. 1,2, and. 3, and another in Fig. 4. In the construction shown in the firstaforesaid figures the part F is cast with a rabbet or groove at f, inwhich the part F can be seated, it resting against the flange orshoulder f upon the rear side. or shoulder f are formed apertures fadapted to permit the passage of bolts f*. The threads of these boltsengage with the plate F by means of these apertures, and after the plateis clamped tightly in position the ends of the bolts may be filed orground off smooth, so as to leave no obstructing projections. In theconstruction shown in Fig. 4 use is made of ears or lugs G, situatedupon the rear side of the part F, and against these rest the plate F,and through them pass the bolts f. Other means for clamping the plate inposition may be used, if desired. In the construction shown in Figs. 1,4., and 5 the detachable plate is pro vided with slots or elongatedapertures, extending entirely through the plate, which are preferablycurved somewhat in the direction of the travel of the earth as it movesover the mold-board. These decrease the friction upon the soil; and alsoadmit air from the rear side of the mold-board to relieve the undersurface of the soil from adhesion against the ure on the other side. Themoist soil tends to adhere to the surface of the mold-board, owing tothe force exerted by atmospheric pressure, and it is overcome byadmitting the air from the under side. As that portion of the boardhaving the slots is detachable, any additional wear from the soil at theedges of the slots is not a serious matter, as the plate can bewithdrawn and another substituted. In another respect my method ofmanufacturing moldboards is superior to those'heretofore followed. Whenthe mold-boards are each cast all in one piece, many are lost, from thefact that the central portion of the board cools last, and as amold-board caused by the atmospheric press-- In the flange result thereis much checking or cracking, which, as said, destroys many of these. Inmy case, the board being cast in two parts, there is less liability forthis checking or cracking to occur.

I am aware of the fact that use has been made 'of moldboards both ofglass and metal-each of which can be entirely removed from .thesupporting-frame, so as to permit the sub stitution of another, and I donot claim such device as my invention. I am also aware of the fact thatdouble mold-boards have been used-that is, mold-boards each having twoor more layers, sheets, or plates of metal or other material, one layeror plate being superposed upon another, and I do not claim these devicesas my invention; but my construction is simplei and more cheaply madethan those re ferred to. It is not necessary to remove the whole of themold'board, and the only requirement is to provide several of the smallplates, one of which can be substituted for another after it has becomeworn.

\Vhat I claim is- 1. In a plow, a mold-board constructed with anaperture, the mold-board surrounding said aperturebeing integralthroughout, in combination with a detachable plate adapted to besituated in said aperture and have its wearingface flush with that ofthe surrounding moldboard, and means for clamping the detachable platein place, substantially as set forth.

2. In a plow, a mold-board having an aperture, the mold-boardsurrounding the aperture being integral throughout, in combination witha detachable wearing-plate provided with slots, substantially as and forthe purposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

OZIA A. ESSIG.

\Vitnesses:

JACOB I. Fixwcn'r'r, HENRY FISHER.

